From which stages is the bleed air from a GE90?
The base engine (up -94B rating) has 10 stages HPC, the growth engine (up to -115B) has 9 (reference https://www.geaviation.com/commercial/engines/ge90-engine).  

In both cases, the type certification is counting bleed starting from the first stage of the HPC (not the LPC).

The reference to "10th stage" bleed in the type certification is misleading.  There is no 10th stage bleed in either engine.  Rather it is "CDP" bleed.  "CDP" stands for "compressor discharge pressure", i.e. right after the last stage of the compressor.

So in the base engine, the last bleed is extracted immediately after the 10th stage, and on the growth engine it's extracted right after the 9th stage.

Below is a diagram showing the bleed air flow that may (hopefully) clarify.  The CDP bleed is in orange.


(image from this and this answer, original source)