Pages can sometimes be finicky about opening certain DOCX files. I find LibreOffice or Google Doc’s sometimes works better.
To display the contents of the file in your website, you will have to copy and paste the contents into a webpage as plain text. DOCX is not a web safe file format.
Alternatively if you want people to view the file online, you could add the file as a resource in the RapidWeaver sidebar and create a link to have the file open with the Google Doc’s viewer:
Modify the above link query string with the actual full URL of the file on your server. This is what we use for previewing DOCX files in Paperless.
There is a 25 MB limit for the Google Doc’s Viewer. But it will handle Microsoft Office documents, Photoshop / Illustrator / PDF files and some other file formats relating to CAD.