Has an AFL game ever ended 84-49?
Yes. AFL has seen a final score of 84-49 7 times. It first happened on May 26, 1923, when Melbourne beat Sydney, and most recently on July 12, 2015, when GWS beat St Kilda.
That makes 84-49 the 191st most common final score out of 6,607 that have ever occurred in AFL. One point away, 85-49 has happened 4 times and 84-50 has happened 3 times. At one point the score disappeared for 40 years, between 1966 and 2006.