A family of Microsoft word processing software products for creating web, email, and print documents.
It would be far simpler to insert a textbox and position that where you want it to be. The formatting tools allow you to size and position the textbox exactly where you want it. You can remove its border too, if you don't want one. Do be aware that your default paragraph format might add some white-space before the first text line. You can omit that by changing the 'before' spacing. Similarly, textboxes have default internal margins, which you might want to reduce to 0, via the textbox formatting tools.
If there are numerous data-entry areas, you might find it better to use a single multi row/column table instead of multiple textboxes. As well as fixing row heights and column widths, you can resize, split and merge individual table cells to get the effect you're after.