In a math test, the scores of 5 students in descending order are 76 points, 82 points, A points, 86 points, and 92 points. What is their average score?
一次数学考试，5名同学的分数从小到大排列是76分、82分、a分、86分、92分，他们的平均分可能是多少分
<result>84</result>