In New York City the average response time for calls to the fire department is about 5 minutes, according to a 2008 article published in the New York...

In New York City the average response time for calls to the fire department is about 5 minutes, according to a 2008 article published in the New York Daily News. Suppose the distribution of times is approximately Normal and the standard deviation is 1.5 minutes.

What is the response time where 85% of the response times are less than this time?