Dropping boxes baesed on value

Saar very simple stuff. plese help. depending on value in text box, the text boxes must move autometci up or down. since you cant see it. there is one vertical scrol arangemnt. within this there are 3 tables. each table contains one text box and 2 buttons to add values . how to make the up and down atomatic. Complete noobe I am. Pls help

Here is pic

ty in advanc