The area of square $ABCD$ is 100 square centimeters, and $AE = 2$ cm. What is the area of square $EFGH$, in square centimeters?

[asy]
pair a,b,c,d,e,f,g,h;
a=(0,17);
b=(17,17);
c=(17,0);
d=(0,0);
e=(5,17);
f=(17,12);
g=(12,0);
h=(0,5);
label("$A$",a,N);
label("$B$",b,N);
label("$C$",c,S);
label("$D$",d,S);
label("$E$",e,N);
label("$F$",f,E);
label("$G$",g,S);
label("$H$",h,W);
draw(a--b--c--d--cycle);
draw(e--f--g--h--cycle);
[/asy]
Since $AE = 2$, $EB = 8$, but since $EFGH$ is a square, $EH = EF$, and $AH = EB$ by ASA congruence of right triangles $AHE$ and $BEF$. By the Pythagorean theorem, $(EH)^2 = (AE)^2 + (AH)^2 = 2^2 + 8^2 = \boxed{68}$, which is also the area of square $EFGH$ as the square of one of its sides.