If you are subscribed to ExportPDF pack then you can login here (https://cloud.acrobat.com/exportpdf ) and get your file converted into docx format.
This KB document would provide you with required instructions : https://helpx.adobe.com/acrobat-com/kb/using-pdfpack.html#main_Export_PDF_to_Word_Excel
You can also use Acrobat software for the same, You can download a FREE 30 Day trial from this Link - https://helpx.adobe.com/acrobat/kb/acrobat-downloads.html
After installing acrobat you have to choose File -> Save as other -> Microsoft Word -> Word Document.
Hope that helps, If you have any other query please feel free to revert back.