Wordpress is sometimes known to have some issues with Tableau embeds. Can you try refreshing your view? If it's still blank, you may need to use an iframe instead.
Rather than use the standard embed code that you pasted, use this instead:
<iframe src= "[here type in the URL link for the viz]" scrolling="no" width="[here type in the width]" height="[here type in the height]" frameborder="0"></iframe>
This has worked for me in the past when trying to embed Tableau vizzes into Wordpress blogs, and I know it's worked for others as well. Let me know if that works for you.