Anchor text hidden behind sticky menu

Hi. On this page, please click on the letter “B” on the yellow alphabet anchor text. I have this setup to jump to the letter “B” further down the page. You will see that the letter B, the table headers, and the first row of the table are hidden behind the theme’s sticky menu (the yellow scrolling anchor text is also in the way, but even when I disable this the main menu still obscures most of the content). Is there CSS that will perhaps move the jump destination up some amount of pixels to compensate? Please note I am not proficient in HTML so please be specific about where any code you provide be inserted. Thanks in advance?

The page I need help with: [log in to see the link]