Has an AFL game ever ended 79-47?
Exactly once. On April 6, 2014, GWS beat Melbourne 79-47, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 79-47 in league history.
That makes 79-47 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 80-47 has happened 1 times and 79-48 has happened 2 times.