We use a vector to set the position we want. You can set the position in the following parts of the armor stand:
# pose: v1,v2,v3
pose:
head: -70.0,0.0,0.0
body: 0.0,0.0,0.0
leftArm: -160.0,30.0,0.0
rightArm: -150.0,0.0,0.0
leftLeg: -170.0,0.0,0.0
rightLeg: -100.0,0.0,0.0