As Noetsi pointed out, it really depends on what you want to do after graduation. If you're unclear, I'd not worry about your minor right away. I basically had minors in philosophy and econ when I graduated and went to a grad program in econ, but my goal was to get into demography and environmental research. Now I'm more focused on analytics and data science since I dropped out (and laugh at economics).
If you want a business focus in your future, accounting is fine if you want to make money. Probability theory will help with the actuarial exams, but beyond that it's a very subject-specific focus (read "boring!!!"). Again, Noetsi is right that knowing SQL is powerful as it's a sort of universal basic language to database systems. Learning C++ is great to understand programming concepts and algorithms, but not very applicable unless you're going to be building your own applications (unlikely). Instead, languages like R, Matlab, and Python will be your way to programming against data and systems.
If I were doing it over again, I'd stay with the stats focus with a programming emphasize, which would probably come through bioinformatics. Regardless, it would be a useful sub-discipline. One of the reasons I chose my econ program I did was that agricultural resource economics as UC Davis had a very heavy econometrics program. Unfortunately, I couldn't stay with the program (no funding). The stats department had positions for their students to work (and get compensation); ag-resource econ didn't.
So focus on what you want to do with your life. If you don't know, don't make decisions! Or at least may strategic ones that put you in a more comfortable (and flexible) position.