To answer this question you will need to use the standard normal table presented below ...

A project's critical path has an expected duration of 79 days with a standard deviation of 8 days. If we wanted to promise a completion time that we'd be 90.32% sure we could live up to, what should that promised completion time be? (Round to 2 decimal places)

Z	G(Z)	Z	G(Z)	Z	G(Z)	Z	G(Z)
0.25	0.5987	0.75	0.7734	1.25	0.8944	1.75	0.9599
0.30	0.6179	0.80	0.7881	1.30	0.9032	1.80	0.9641
0.35	0.6368	0.85	0.8023	1.35	0.9115	1.85	0.9678
0.40	0.6554	0.90	0.8159	1.40	0.9192	1.90	0.9713
0.45	0.6736	0.95	0.8289	1.45	0.9265	1.95	0.9744
0.50	0.6915	1.00	0.8413	1.50	0.9332	2.00	0.9772
0.55	0.7088	1.05	0.8531	1.55	0.9394	2.05	0.9798
0.60	0.7257	1.10	0.8643	1.60	0.9452	2.10	0.9821
0.65	0.7422	1.15	0.8749	1.65	0.9505	2.15	0.9842
0.70	0.7580	1.20	0.8849	1.70	0.9554	2.20	0.9861