Has an AFL game ever ended 75-54?
Exactly once. On July 11, 1964, Melbourne beat Geelong 75-54, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 75-54 in league history.
That makes 75-54 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 76-54 has happened 3 times and 75-55 has happened 4 times.