Question 790624
Add up the values, then divide by 5 (since there are 5 data values) to get the mean of 91


(99 + 86 + 76 + 95 + x)/5 = 91


(356 + x)/5 = 91


356 + x = 5*91


356 + x = 455


x = 455 - 356


x = <font color="red">99</font>