Has an AFL game ever ended 91-84?
Exactly once. On May 20, 1972, Richmond beat Hawthorn 91-84, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 91-84 in league history.
That makes 91-84 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 92-84 has happened 8 times and 91-85 has happened 8 times.