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How do I find the raw score on the SAT that corresponds to each of the...

How do I find the raw score on the SAT that corresponds to each of the following percentiles?

40th, 80th, 65th and 95th

Here is the original question"Find the raw score on the SAT that corresponds to each of the following percentiles" I found this equation but im not sure if its correct or how to use it, X = μ + zσ Thanks!

Math   Statistics-And-Probability   
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