Okay, you can provide the PDF file buy either using Adobe Acrobat Pro or you can use the Preview app which is preinstalled on your computer and do a Save As and save your file as a PDF.
For the Word doc you can download the free app LibreOffice and then once you have the file open, do a Save As and select the file type for your client.
However, by asking you it needs to be readable as a MS Word document, he's only giving you part of the story. He needs to be more specific as Word has multiple formats. If he doesn't know just do the Save As as a .doc document. His request is kind of like a realtor has to face with new clients looking for a home. They cannot just say I want a house in Manhattan, they have to be specific like I want a 5 bedroom, 2 story home with 6000 sq. ft. and it must cost less than $750,000 and be newly remodeled. With that information the realtor can then tell them they are dreaming as you simply won't find what he's looking for in that price range in Manhattan.