Patty, I would follow print and braille this number line as a tactile graphic, using numeric indicators. This appears to be a book for the elementary grades, so it should follow print layout if possible, especially if this is the first time the concept is shown.
If the book has *many more of these, it would be OK to rotate them (at your discretion, and only as a space-saving device) but this change must be explained in a transcriber’s note; and if the “move down” text continues, embed a TN changing the directive to “move left” (and “move up” to “move right”). Ordinarily we do not change the wording, but in this case it is needed for clarity.