That screenshot doesn't help at all...the settings are under the green "..." button. Here's some example settings.. http://www.donaldphan.com/tutorials/xnormal/xnormal_occ.html
You should check out some scans . even if the proportions are stylized the anatomy is the same . For example that's not how the butt works . Good luck !
Here's a better example: Also added colored specular (separate texture) to this version. Again, the blendmap uses UV chan 3. Terrain_Blend2_Colorspec_noalpha.fx