SOLUTION: P(z>-1) IM CONFUSED MY TEACHER GOT .8431 AND I GOT .8417 CAN YOU SHOW ME HOW TO SOLVE THIS

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Question 1099816: P(z>-1) IM CONFUSED MY TEACHER GOT .8431 AND I GOT .8417 CAN YOU SHOW ME HOW TO SOLVE THIS
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I used EXCEL's NORMSDIST function for z=-1.
P%28z%3C=-1%29=0.158655
So,
P%28z%3E-1%29=1-0.158655
P%28z%3E-1%29=0.8413
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.
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What method are each of you using?
Perhaps there is some roundoff error to each but I'm surprised you only have two decimal place agreement.