The page for that grave appears to be here: https://mountofolives.co.il/he/deceased_card/%D7%99%D7%A8%D7%95%D7%97%D7%9D-%D7%A6%D7%91%D7%99-%D7%A8%D7%95%D7%98%D7%A7%D7%95%D7%91%D7%99%D7%A5-yeruham-zvi-rotkowitz/#gsc.tab=0

It has section this which I believe gives the text of the inscription:
However, there doesn't seem to be a photo for that grave, unlike some others I've seen on their web site. (For example, http://mountofolives.co.il/he/deceased_card/%D7%99%D7%95%D7%9D-%D7%98%D7%95%D7%91-%D7%9C%D7%99%D7%A4%D7%90-%D7%9C%D7%90-%D7%99%D7%93%D7%95%D7%A2/#gsc.tab=0)

I have noticed that their web site has been flaky in the past, so that some times it wouldn't load. Now there's a little box with the letter "i" in a circle, and text which Google Translate says means that the site is under construction, and you can note errors etc using the comment form at the bottom of the page.