Can you help me with my homework, I don't understand you

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1