Question 879203
Tell me do You have an TI Calculator?
Are You checking Your answers? or not a clue?
Question 1: z = 2   *Note: {{{z = blue(x - mu)/blue(sigma)}}}
Question 2: x = 65   {{{1.5*10+ 50}}}
Question 3: P(z < -1.5)= .0668
Question 4: P(z > 2)= .0228
Question 5: P(-1.5 < z < 1.5) = .9332 -.0668
Question 6: P(x < 35) =  P(z < -1.5)= .0668 *Note: {{{z = blue(x - mu)/blue(sigma)}}}

Below:  z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.  
The area under the normal curve to the left of a particular z-value = P(z)
Note: z = 0 (x value: the mean) 50% of the area under the curve is to the left and 50%  to the right
{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, exp(-x^2/2)), green(line(1,0,1,exp(-1^2/2)),line(-1,0,-1,exp(-1^2/2))),green(line(2,0,2,exp(-2^2/2)),line(-2,0,-2,exp(-2^2/2))),green(line(3,0,3,exp(-3^2/2)),line(-3,0,-3,exp(-3^2/2))),green(line( 0,0, 0,exp(0^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}