When exporting a model to DXF that contains Right-to-Left text such as Hebrew or Arabic, the text will not export correctly when the .DXF file is opened in AutoCAD.
Make sure you have build 08.11.04.58 (or newer) and the latest cumulative patch (as of 12/5/2013) installed before following these steps.
Click on Annotate
Click on the pull down arrow to the right of "Text"
Click on "New"
Give the new style a name. Click on OK.
Click on "Apply", then "Close"
Select the text that shows up as "????"
Click on the font style in the "Annotate" pull down and select the new font name that you have created.