Step 1 :Find a z-value to the right of the mean so that 84.1\% of the distribution lies to the left of it. Refer to the table of values Area Under the Standard Normal Distribution as needed.
Step 2 :\[z=\]
Step 3 :Using a standard normal distribution table or a calculator, we find the z-value corresponding to an area of 0.841.
Step 4 :\[z \approx 0.9986\]
Step 5 :\(\boxed{z \approx 0.9986}\)