I added an image to Excel and used these settings. Just pick your height and the object should size to the dimension you want. This is assuming that you have it set up proportionately in your QV app.
In this case, I adjusted the height to 300 or 3 Inches and let Nprinting automatically adjust the width based on the ratio in the qv app.
Hope that helps!
This has been discussed several times in this forum. Here is one discussion: Re: Instertion of a picture with NPrinting.
In your case it looks like the Max Width is restricted to 500 and the height adjusted proportionately as expected when using the Fit Inside option.
HTH - Daniel.
I have come up with a fix, but I can't see it mentioned in any of the previous discussions. What I did was insert some lines, enough to hold the chart, then put the chart object on the last line, which is very important or it does not work when converted to html output. The object properties are set as "don't fit". Then hide the lines and preview.
Screenshots below. The image appears in the correct place, the hidden lines disappear and the data to the right does not get pushed down.