In Excel, worksheets start from the left and also read from left to right. However, if for some reason it changed the direction from right to left, and you want to change it back, please follow the steps below:
Step 1: Click the "File" Tab from the ribbon;
Step 2: Click "Options" from the left navigation menu;
Step 3: Click "Advanced" from the left navigation menu in the dialog box;
Step 4: Uncheck "Show sheet right-to-left" under the section of "Display options for this worksheet";
Step 5: Click "OK" at the bottom.