embed fonts using adobe acrobat

no embed choice in any of 7 menu options

There should not be an embed option in that menu.
The option you're looking for is called "Edit document text". It won't appear if the document is protected.

Not protected.
Is it edit text in screenshot i sent.

I am doing this to upload pdf and that
Is error fix

You're sure you have Acrobat X? Our screenshots are different.

You probably need to click on "Edit text&images" on your version, then select the problem paragraph, right click it, select "Properties" and make sure that "Subset" is NOT checked.

sorry I am using adobe acrobat XI

no right click option of properties
no right click and select all option of properties

no
 "Edit text&images"
no
edit document text

document properties (fonts) and content editing (edit text and images)

Looks like this should work for Acrobat XI: http://khkonsulting.com/2014/06/font-embedding-acrobat/

I test with 5 pdf and preflight is grey

is there an easier option like changing all text to font 'courier new'

Why is my preflight greyed out?

Can this be done in adobe acrobat or do I need another program?

There could be many reasons and solving this via screenshots is nigh on impossible. Firstly we need to identify if it is an issue with the PDFs or with the installation...

Can you post a test pdf in which this does not work?

Can you post a test pdf in which this does not work?

All pdf
I will post a short less than 3 page test that I find on google
http://mensenhandel.nl/files/pdftest2.pdf

I can not even see the bottom tab 'print production'  currently (but I could previously)
http://filedb.experts-exchange.com/incoming/2014/08_w33/866233/preflight-grey.JPG.

Acrobat Pro XI

preflight not there so I explained to uploader and fixed problem on pdf

Thanks for advice.