[Written before the drawing was posted -- sorry, but this won't work with what's in the drawing. But if you can get it in Text/Mtext form....]
If that's an isometric 2D drawing, and not a view of a 3D construction, and if that's a TEXT object [not a drawn outline made of of other object types], then just select it, and in the Properties palette:

[You can enter them as -30 if you prefer.] The minus-30 rotation gives it the downhill slope, and the obliquing angle leans it back so the vertical parts of the characters in the font become vertical in the drawing.
If it's an MTEXT object, you need to do the obliquing in the Mtext Editor -- select all the content, and in the Formatting pull-down is an Obliquing entry:

EDIT: The text [once the containing Block is Exploded and the containing Group is Ungrouped] is Spline outlines. How were they created? I'm wondering whether you could do the rotating/obliquing to Text/Mtext first, and then do the conversion, whatever it is. [If you do that using TXTEXP to make that into outlines, it can handle the altered form, but the outline will be 2D Polylines, not Splines, and the curves will be somewhat segmented.]
Kent Cooper, AIA