The correct option is (B).24 miles.
Z-score is basically another term for the specific number of standard deviations. I suppose we can assume normality here, even though it isn't given, so I'd make a rough sketch.
Otherwise, just use the basic formula:
Given that,
(statistic for a mean) and
(statistic for a standard deviation).
Since z-score must be Less than 1.5, So
I just used normal cdf and got .
Hence the correct option is (B).24 miles.
For more details on z score follow the link: