\[\boxed{\mathbf{94.}}\]
\[23 \approx 20\]
\[28 \approx 30\]
\[37 \approx 40\]
\[31 \approx 30\]
\[52 \approx 50\]
\[55 \approx 60\]
\[79 \approx 80\]
\[74 \approx 70\]