Get correct position

how to identify the correct position for mustaches ?
i use this code with the help of net.
for i in range(mostache.shape[0]):
for j in range(mostache.shape[1]):
if(mostache[i,j,3]>0):
fullimg[y+i,x+j,:]=mostache[i,j,:-1]

but from this mustaches does not fit perfectly it is somewhat on the nose not below the nose.

so how can i correct it?