Has an AFL game ever ended 91-79?
It has. 91-79 has been a AFL final 6 times in 16,622 games. The first was Geelong beat Richmond on September 1, 1923; the latest was Fremantle beat Collingwood on June 26, 2021.
That makes 91-79 the 342nd most common final score out of 6,607 that have ever occurred in AFL. One point away, 92-79 has happened 10 times and 91-80 has happened 3 times. At one point the score disappeared for 44 years, between 1977 and 2021.