Mode is the number that appears the most often.
There are 8 numbers. Here is the amount each number appears:
[tex] 63 \rightarrow 1\ time \\ 70 \rightarrow 1\ time \\ 75 \rightarrow 1\ time \\ 80 \rightarrow 1\ time \\ 85 \rightarrow 3\ times \\ 92 \rightarrow 2\ times \\ 95 \rightarrow 1\ time \\ 99 \rightarrow 1\ time [/tex]
Since 85 appears the most, 85 is the mode