Rotate and save objects rotation for further lookAt manipulation

Questions
1

Hello i made 3D model and want it to face camera.
I want my mesh to face camera like this

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4602×554 45.4 KB

but got this result
(upload://vI5kPycdirG2fkGO1zezfyQiHhS.png)

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3602×554 156 KB

this are my mesh rotation axises
1 ![2|543x499]

How can i rotate first on y axis 90 deg and save that rotation as my object initial orientation.
Or maybe i am getting it wrong.

2

ok Got it by myself.
You need to rotate geometry

head.geometry.rotateY(Math.PI / 2);
head.geometry.rotateZ(Math.PI / 2);