Hi gcw92591042,
I just checked your subscription details and you are currently subscribed to Adobe Export PDF service that enables you to convert pdf documents into various other formats like .doc, .rtf etc.
However in order to convert such files back into pdf format, you need to subscribe to Adobe PDF Pack(Reliably Create PDFs, Convert PDFs, & Merge PDFs Online | Adobe PDF Pack ).
Alternatively you can use Acrobat software to edit your pdf files without getting into the hassle of converting them into doc format and vice-verse. You can download a free 30 day trial from this Link - Download Acrobat products | Standard, Pro | XI, X
Hope that helps with your query. Please revert back if you have any other questions or need any further assistance.
Regards,
Rahul