Question: Based on the Normal model for car speeds (in km/h) on a road N (77, 9.1), what is the cutoff value for the highest 15%

Based on the Normal model for car speeds (in km/h) on a road N (77, 9.1), what is the cutoff value for the highest 15% of the speeds,to one decimal place accuracy? N (x, s) means a normal distribution with a mean of x and a standard deviation of s.

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