To find probability for Normal Distribution useNormal Distribution Calculator.

Keep in mind:

total area under the curve = 1

P (z > k) = 1 - P (z < k)

P(z1 < z < z2) = P(z < z2) P(z < z1)

Select your own values of z1 and z2,

each between -3.00 and +3.00

Then use Online Normal Distribution Calculatorand find:

Z1 2.50

Z2 -1.45