Has an AFL game ever ended 84-84?
Exactly once. On March 27, 2011, Melbourne and Sydney drew 84-84, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 84-84 in league history.
That makes 84-84 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 85-84 has happened 8 times and 84-85 has happened never.