Has an NBA game ever ended 86-76?
Yes. NBA has seen a final score of 86-76 22 times. It first happened on January 21, 1949, when Chicago Stags beat Boston Celtics, and most recently on February 6, 2013, when Los Angeles Clippers beat Orlando Magic.
That makes 86-76 the 917th most common final score out of 3,189 that have ever occurred in NBA. One point away, 87-76 has happened 19 times and 86-77 has happened 29 times. Nearly all of its occurrences fall between 1980 and 2009. At one point the score disappeared for 39 years, between 1950 and 1989.