Domestic Box Office For September 1984
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Amadeus | $51,564,280 | 802 | $505,276 | 1% | 25 | Sep 21 | Aug 15 | Orion Pictures |
| 2 | All of Me | $36,403,064 | 1,200 | $5,803,848 | 15.9% | 1,192 | Sep 21 | - | Universal Pictures |
| 3 | Places in the Heart | $34,901,614 | 868 | $274,279 | 0.8% | 14 | Sep 21 | - | TriStar Pictures |
| 4 | A Soldier's Story | $21,821,347 | 581 | $156,383 | 0.7% | 5 | Sep 14 | Feb 21 | Columbia Pictures |
| 5 | The Evil That Men Do | $13,102,025 | 1,464 | $4,538,400 | 34.6% | 1,464 | Sep 21 | - | TriStar Pictures |
| 6 | Irreconcilable Differences | $12,414,210 | 902 | $3,076,894 | 24.8% | 902 | Sep 28 | - | Warner Bros. |
| 7 | The Wild Life | $11,020,375 | 1,142 | $4,001,400 | 36.3% | 1,140 | Sep 28 | - | Universal Pictures |
| 8 | Country | $9,640,000 | 488 | $24,443 | 0.3% | 1 | Sep 28 | - | Walt Disney Studios Motion Pictures |
| 9 | Ninja III: The Domination | $7,610,785 | 530 | $1,727,546 | 22.7% | 530 | Sep 14 | - | Cannon Film Distributors |
| 10 | Until September | $4,239,154 | 1,114 | $1,983,321 | 46.8% | 1,114 | Sep 21 | - | Metro-Goldwyn-Mayer (MGM) |
| 11 | Exterminator 2 | $3,739,406 | 535 | $1,204,197 | 32.2% | 535 | Sep 14 | - | Cannon Film Distributors |
| 12 | The Brother from Another Planet | $3,677,209 | - | - | - | - | Sep 7 | - | Cinecom Pictures |
| 13 | The Warrior and the Sorceress | $2,886,225 | 238 | $574,210 | 19.9% | 238 | Sep 7 | - | New World Pictures |
| 14 | Impulse | $2,773,433 | 376 | $995,570 | 35.9% | 376 | Sep 28 | - | Twentieth Century Fox |
| 15 | The Bear | $2,687,148 | 750 | $1,160,644 | 43.2% | 750 | Sep 28 | - | Embassy Pictures |
| 16 | Body Rock | $1,689,501 | 240 | $631,849 | 37.4% | 240 | Sep 28 | - | New World Pictures |
| 17 | The River Rat | $1,142,944 | 316 | $441,466 | 38.6% | 316 | Sep 21 | - | Paramount Pictures |
| 18 | Windy City | $343,890 | 28 | $104,754 | 30.5% | 28 | Sep 21 | - | Warner Bros. |
| 19 | Heartbreakers | $148,750 | - | - | - | - | Sep 28 | - | Orion Pictures |
