The stem and leaf plot shows the shoe sizes of 22 students in Mr. Millford’s first period class.

A stem and leaf plot. The stems are 6, 7, 8, 9, 10, 11. The first column of leaves are 0, 0, 5, 0, 0, 0. The second column of leaves are 0, 0, 5, 5, 0, 0. The third column of leaves are 0, 5, blank, 5, 5, blank. The fourth column of leaves are blank, 5, blank, blank, 5, blank. The fifth column of leaves are blank, 5, blank, blank, blank, blank.

The mean shoe size is 8.5. How many students had a shoe size greater than the mean shoe size?
3
4
10
12
Please help!!!