How to shade a portion of a graph

How can I shade under the curve, and after x=1.25?

x=[-3:.1:3]; %

Y=normpdf(x,0,1);

plot(x,Y,'b')

xlim([-3 3])

ylim([0 0.4])

hold on

index=[1.25:3] %area i want shaded

fill(x,Y,index,'g')

Answer 1

[David Hill]

x=[-3:.1:3]; %
Y=normpdf(x,0,1);
plot(x,Y,'b')
xlim([-3 3])
ylim([0 0.4])
hold on
area(x(x>=1.25),Y(x>=1.25),0,'EdgeColor','none','FaceColor','b')

[Kyle Langford]

Thank you!