Has an AFL game ever ended 84-40?
Exactly once. On July 23, 1960, Fitzroy beat Carlton 84-40, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 84-40 in league history.
That makes 84-40 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 85-40 has happened 2 times and 84-41 has happened never.