The calculated z-value of the area of 5% is 1.645
How to determine the z-value of the area
From the question, we have the following parameters that can be used in our computation:
A = 5%
This means that
Area = 5%
Evaluate
Area = 0.05
The z-value of the area is calculated using
z = P(A = 0.05)
Using the z table of probabilities, we have
z = 1.645
Hence, the z-value of the area is 1.645