Question 1122077
Use a table or a calculator such as this one provided at the link below


<a href = "http://onlinestatbook.com/2/calculators/normal_dist.html">http://onlinestatbook.com/2/calculators/normal_dist.html</a>


I prefer a calculator option because it's faster, more efficient, less error prone, etc. If you use the calculator at the link, then type in 5 for the mean, 0.75 for the SD (Standard Deviation) and click the "below" button. In the box next to "below", type in 4. All of this will compute {{{P(X <= 4)}}}


Using the calculator, we see that the answer is 0.0912 which is fairly close to 0.0918; chances are that your teacher is having you use a Z table, which might explain the slight discrepancy