What percentage of scores in a normal distribution fall at or below a z score of 2.57?

Question:

What percentage of scores in a normal distribution fall at or below a z score of −2.57?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

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