Question 1161705
Your work is correct and z=-3.87
on a calculator you get a probability of z <-3.87 as 0.000054 or 0.0001 rounded to four places.

For the other one, z>-4.1/16/sqrt(60).  This is z>-4.1*sqrt(60)/16, or z>-1.98, which has probability of 0.9764.
I interpret that as a new problem, the mean of the sample >88.9

The left skew doesn't change anything with a sample size of 60, where the central limit theorem will apply.